FileInfo.h (1815B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef DOM_INDEXEDDB_FILEINFO_H_ 8 #define DOM_INDEXEDDB_FILEINFO_H_ 9 10 #include "SafeRefPtr.h" 11 #include "nsCOMPtr.h" 12 #include "nsISupportsImpl.h" 13 14 namespace mozilla::dom::indexedDB { 15 16 class FileInfoBase { 17 public: 18 using IdType = int64_t; 19 20 IdType Id() const { return mFileId; } 21 22 protected: 23 explicit FileInfoBase(const int64_t aFileId) : mFileId(aFileId) { 24 MOZ_ASSERT(mFileId > 0); 25 } 26 27 private: 28 const IdType mFileId; 29 }; 30 31 template <typename FileManager> 32 class FileInfo final : public FileInfoBase { 33 public: 34 using AutoLockType = typename FileManager::AutoLockType; 35 36 FileInfo(const typename FileManager::FileInfoManagerGuard& aGuard, 37 SafeRefPtr<FileManager> aFileManager, const int64_t aFileId, 38 const nsrefcnt aInitialDBRefCnt = 0); 39 40 void AddRef(); 41 void Release(const bool aSyncDeleteFile = false); 42 43 void UpdateDBRefs(int32_t aDelta); 44 45 void GetReferences(int32_t* aRefCnt, int32_t* aDBRefCnt); 46 47 FileManager& Manager() const; 48 49 nsCOMPtr<nsIFile> GetFileForFileInfo() const; 50 51 void LockedAddRef(); 52 bool LockedClearDBRefs( 53 const typename FileManager::FileInfoManagerGuard& aGuard); 54 55 private: 56 void UpdateReferences(ThreadSafeAutoRefCnt& aRefCount, int32_t aDelta, 57 bool aSyncDeleteFile = false); 58 59 void Cleanup(); 60 61 ThreadSafeAutoRefCnt mRefCnt; 62 ThreadSafeAutoRefCnt mDBRefCnt; 63 64 const SafeRefPtr<FileManager> mFileManager; 65 }; 66 67 } // namespace mozilla::dom::indexedDB 68 69 #endif // DOM_INDEXEDDB_FILEINFO_H_